To preface this.. I know t's family from the very small school our kids go to, and dance studio. One day I was at school after hours, doing parent teacher fellowship stuff and t's daughter was there having a band lesson. T came to pick her up, and times got messed up, so she wasn't done but t had to get back, and mom wasn't available. So he asked me if i could bring her home. Wasn't a problem for me as they live close to school, and I have been to their house before (minus t being there) After I did it, t asked me if I felt put out by doing it and if I felt weird and the answers were all no.
Interestingly enough, with all the times that t and I see each other out of session, we rarely interact. Just a quick wave or smile at each other. It has never affected out t/client relationship.
Mona, I will say t and I have awesome relationship and I am able to call him out in stuff as well as he. You have talked about the rocky relationship with your t. If you have any doubts about doing the favor, you feel uncomfortable you should follow your gut.

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